This work investigates twinlike scalar field models that support kinks with the same energy density and stability. We find the first-order equations compatible with the equations of motion. We use them to calculate the conditions under which they attain the twinlike character. The linear stability is also investigated, and there we show that the addition of extra requirements may lead to the same stability under small fluctuations.

中文翻译：

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标量场的新孪生模型

这项工作研究了孪晶状标量场模型，该模型支持具有相同能量密度和稳定性的扭结。我们发现与运动方程兼容的一阶方程。我们用它们来计算获得双胞胎性格的条件。还对线性稳定性进行了研究，并且我们发现，增加额外的要求可能会在较小的波动下导致相同的稳定性。